Princeton, NJ Weather & Growing Conditions
Overnight
63°F
Partly Cloudy
Partly cloudy, with a low around 63. North wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 85°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 64°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 52% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph S | 65% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 30% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 35% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Sunday | 89°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 71°F | Mostly Clear | 0 to 5 mph W | 14% |
| Monday | 91°F | Sunny | 0 to 10 mph W | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Princeton, NJ
Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
173 days
Hardiness zone
7a
Explore more for Princeton, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Hightstown 2 W, Nj (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.